418P/LINEAR
| Parameter |
Value |
| Designation |
418P/LINEAR |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2010-04-19T02:07:15.358080Z |
| Orbit solution date (soln_date, UTC) |
2022-10-07T00:44:00Z |
| Obs used |
775 |
| NEO |
- |
| M1 |
13.900 |
| K1 |
10.000 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2020-12-23T11:39:09.792000Z |
| Discovery magnitude (MPC) |
21.70 w |
| Discovery observatory (MPC) |
F52 · Pan-STARRS 2, Haleakala |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2012-02-05.0000000 |
| e |
0.66371734 |
| q (au) |
1.715751 |
| a (au) |
5.102109 |
| i (deg) |
5.780390 |
| Ω (om, deg) |
277.862905 |
| ω (w, deg) |
306.887500 |
| M (ma, deg) |
56.180600 |
Magnitude
Scatter + Global Linear
$$
M_a = (10.828 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
10.828 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.850 |
| k |
1.000 |
| δ90 |
9.999 |
| Parameter |
Symbol |
Range |
Description |
| Absolute magnitude at 1 AU from Sun and Earth |
H0 |
-5 to 20 |
Intrinsic brightness of the comet |
| Photometric slope parameter |
n |
2 to 6 |
Rate of brightness change with heliocentric distance |
| Forward scattering asymmetry factor |
gf |
0.8 to 1 |
Degree of forward scattering |
| Backward scattering asymmetry factor |
gb |
-1 to -0.5 |
Degree of backward scattering |
| Partitioning coefficient |
k |
0.8 to 1 |
Ratio between forward/backward scattering contributions |
| Dust-to-gas brightness ratio |
δ90 |
1 to 10 |
Relative contribution of dust scattering to gas emission |
Reference: EPSC-DPS2025-160
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-02-03 00:00 |
01:27:58.70 |
+14:41:29.3 |
HIP 6860 |
13.79 |
| 2026-02-03 12:00 |
01:28:06.37 |
+14:41:52.5 |
HIP 6860 |
13.63 |
| 2026-02-04 00:00 |
01:28:14.14 |
+14:42:16.4 |
HIP 6860 |
13.73 |
| 2026-02-04 12:00 |
01:28:22.00 |
+14:42:40.9 |
HIP 6860 |
14.11 |
| 2026-02-05 00:00 |
01:28:29.95 |
+14:43:06.1 |
HIP 6860 |
14.76 |
| 2026-02-05 12:00 |
01:28:38.00 |
+14:43:31.8 |
HIP 6860 |
15.64 |
| 2026-02-06 00:00 |
01:28:46.15 |
+14:43:58.3 |
HIP 6860 |
16.74 |
| 2026-02-06 12:00 |
01:28:54.39 |
+14:44:25.3 |
HIP 6860 |
18.01 |
| 2026-02-07 00:00 |
01:29:02.72 |
+14:44:53.0 |
HIP 6860 |
19.44 |
| 2026-02-07 12:00 |
01:29:11.14 |
+14:45:21.2 |
HIP 6860 |
21.00 |
| 2026-02-08 00:00 |
01:29:19.66 |
+14:45:50.1 |
HIP 7043 |
21.62 |
| 2026-02-08 12:00 |
01:29:28.27 |
+14:46:19.6 |
HIP 7043 |
19.51 |
| 2026-02-09 00:00 |
01:29:36.97 |
+14:46:49.8 |
HIP 7043 |
17.39 |
| 2026-02-09 12:00 |
01:29:45.76 |
+14:47:20.5 |
HIP 7043 |
15.25 |
| 2026-02-10 00:00 |
01:29:54.63 |
+14:47:51.8 |
HIP 7043 |
13.11 |
| 2026-02-10 12:00 |
01:30:03.60 |
+14:48:23.7 |
HIP 7043 |
10.97 |
| 2026-02-11 00:00 |
01:30:12.66 |
+14:48:56.3 |
HIP 7043 |
8.87 |
| 2026-02-11 12:00 |
01:30:21.81 |
+14:49:29.4 |
HIP 7043 |
6.83 |
| 2026-02-12 00:00 |
01:30:31.04 |
+14:50:03.1 |
HIP 7043 |
5.01 |
| 2026-02-12 12:00 |
01:30:40.36 |
+14:50:37.4 |
HIP 7043 |
3.74 |
| 2026-02-13 00:00 |
01:30:49.76 |
+14:51:12.3 |
HIP 7043 |
3.72 |
| 2026-02-13 12:00 |
01:30:59.26 |
+14:51:47.7 |
HIP 7043 |
4.99 |
| 2026-02-14 00:00 |
01:31:08.83 |
+14:52:23.8 |
HIP 7043 |
6.88 |
| 2026-02-14 12:00 |
01:31:18.49 |
+14:53:00.4 |
HIP 7043 |
9.04 |
| 2026-02-15 00:00 |
01:31:28.24 |
+14:53:37.5 |
HIP 7043 |
11.32 |
| 2026-02-15 12:00 |
01:31:38.07 |
+14:54:15.3 |
HIP 7120 |
11.51 |
| 2026-02-16 00:00 |
01:31:47.98 |
+14:54:53.6 |
HIP 7120 |
10.78 |
| 2026-02-16 12:00 |
01:31:57.97 |
+14:55:32.5 |
HIP 7120 |
10.59 |
| 2026-02-17 00:00 |
01:32:08.04 |
+14:56:11.9 |
HIP 7120 |
10.98 |
| 2026-02-17 12:00 |
01:32:18.20 |
+14:56:51.8 |
HIP 7120 |
11.92 |
| 2026-02-18 00:00 |
01:32:28.43 |
+14:57:32.3 |
HIP 7120 |
13.29 |
| 2026-02-18 12:00 |
01:32:38.75 |
+14:58:13.4 |
HIP 7120 |
14.98 |
| 2026-02-19 00:00 |
01:32:49.14 |
+14:58:55.0 |
HIP 7120 |
16.92 |
| 2026-02-19 12:00 |
01:32:59.61 |
+14:59:37.1 |
HIP 7120 |
19.03 |
| 2026-02-20 00:00 |
01:33:10.16 |
+15:00:19.8 |
HIP 7120 |
21.27 |
| 2026-02-20 12:00 |
01:33:20.78 |
+15:01:02.9 |
HIP 7120 |
23.61 |
| 2026-02-21 00:00 |
01:33:31.48 |
+15:01:46.6 |
HIP 7120 |
26.03 |
| 2026-02-21 12:00 |
01:33:42.26 |
+15:02:30.8 |
HIP 7120 |
28.52 |
| 2026-02-22 00:00 |
01:33:53.11 |
+15:03:15.6 |
HIP 7120 |
31.06 |
| 2026-02-22 12:00 |
01:34:04.03 |
+15:04:00.8 |
HIP 7120 |
33.64 |
| 2026-02-23 00:00 |
01:34:15.03 |
+15:04:46.5 |
HIP 7436 |
33.43 |
| 2026-02-23 12:00 |
01:34:26.09 |
+15:05:32.7 |
HIP 7436 |
32.34 |
| 2026-02-24 00:00 |
01:34:37.23 |
+15:06:19.5 |
HIP 7436 |
31.45 |